在hive的官方文档中给的例子中字段分隔符是\001,但是在他的API文档中--hive-delims-replacement ，--hive-drop-import-delims 参数中会处理的字符是\0x01,一个时8进制的1，一个是16进制的1，有这么一点差别，lz为了确认这两个是否一样故做了下面的实验
CREATE TABLE page_view(viewTime INT, userid BIGINT, page_url STRING, referrer_url STRING,
ip STRING COMMENT 'IP Address of the User')
COMMENT 'This is the page view table'
PARTITIONED BY(dt STRING, country STRING)
ROW FORMAT DELIMITED
FIELDS TERMINATED BY '\001'
STORED AS SEQUENCEFILE; |
The above statement lets you create the same table as the previous table.
In the previous examples the data is stored in <hive.metastore.warehouse.dir>/page_view. Specify a value for the key hive.metastore.warehouse.dir in the Hive config file hive-site.xml.
--hive-delims-replacement <arg> Replace Hive record \0x01
and row delimiters (\n\r)
from imported string fields
with user-defined string
--hive-drop-import-delims Drop Hive record \0x01 and
row delimiters (\n\r) from
imported string fields
这两个参数不能一起用
元数据（中间的方格是\001,用java代码生成的）
11 QQjyyh qwqwqw 1 1111 2017/10/15 23:27:48
15 javajyyh 中文 2 1212 2017/10/15 23:39:57
sqoop import --connect jdbc:oracle:thin:@MSI:/study --username luo --password Sys_20170929 --table TB_NEWS --fields-terminated-by "\001" --lines-terminated-by "\n" --hive-import --hive-overwrite --null-string "" --null-non-string "" --fetch-size -m --create-hive-table --hive-table luoqi_test.TB_NEWS --delete-target-dir
导入之后hive的结构是
11.0 QQ|jyyh qwqwqw 1 1111 2017-10-15 23:27:48.0
15.0 java|jyyh 中文 2 1212 2017-10-15 23:39:57.0
结果，'\001'被替换成正确的字符
结论，\001可以被--hive-delims-replacement 参数替换
导出将这个符号还原？